Just did a semi-successful 3.4 firmware update to my DXG. I tried the update for KF8, but it is not working. Here are what I did. Hopefully some expert can fix the problem.

1) did 3.2.1 update with Yifan's instructions/tools.
2) did 3.3 update according to the link. This one may be an incomplete update.
3) downloaded 3.4 file from Amazon and unpacked it by kindletool. Deleted the patchs of fb.modes, webkit library and kernel. Repack the whole things into a new bin file. followed normal update.

At least the firmware version shows "3.4"

Settings of parental control, voice guide, etc are there. Font rendering is more like K4's. PDF contrast can be adjusted.

1) download the bin file from amazon. The one for wifi+3G.
2) "kindletool convert xxx.bin". concert it to .tgz/.tar.gz file.
3) unarchive the .tgz/tar.gz file to a sub-directory.
4) cd into the sub-directory, use any txt editor to open "611680021-1725970040.ffs". delete those lines related to the list of files above. Save the file. I also delete the kernel item in "update-Update_611680021-1725970040.dat".
5) use "kindletool create ota --device dxg * update_3.4.bin" to repack the files.
6) copy update_3.4.bin to kindle and update.

1) libwebkit patch failed due to memory issue. It looks DXG has no enough memory. I applied patch outside and copy it to kindle.
2) The KF8 issue is more complicated. htmlreader is used to process mobi8 files. htmlreader sends requests to a process "webreader". But the "webreader" crashes, probably due to incompatible rink_fb modules. The 3.4 was built on top of different kernel from DXG, so all the kernel module updates are not effective in DXG.

Just did a semi-successful 3.4 firmware update to my DXG. I tried the update for KF8, but it is not working. Here are what I did. Hopefully some expert can fix the problem.

1) did 3.2.1 update with Yifan's instructions/tools.
2) did 3.3 update according to the link. This one may be an incomplete update.
3) downloaded 3.4 file from Amazon and unpacked it by kindletool. Deleted the patchs of fb.modes, webkit library and kernel. Repack the whole things into a new bin file. followed normal update.

At least the firmware version shows "3.4"

Settings of parental control, voice guide, etc are there. Font rendering is more like K4's. PDF contrast can be adjusted.